SEX-RELATED DIFFERENCES IN DIET AND FEEDING METHOD IN THE OYSTERCATCHER HAEMATOPUS-OSTRALEGUS
SEX-RELATED DIFFERENCES IN DIET AND FEEDING METHOD IN THE OYSTERCATCHER HAEMATOPUS-OSTRALEGUS
复制标题
DOI：
10.2307/5495
复制
发表时间：
1993-01-01
影响因子：
4.8
通讯作者：
CALDOW, RWG
中科院分区：
文献类型：
--
作者：
DURELL, SEALD;GOSSCUSTARD, JD;CALDOW, RWG
1.以往的研究表明，在Exe河口的牡蛎捕手的饮食和喂养方式的个体差异与年龄有关。在本文中，它们也与性别有关.采用判别分析法对在Exe河口捕获并环扎的美洲牡蛎进行性别鉴定.测量了喙尖形状，并将其与饮食和饲养方法相关联。喙尖的鸟是泥滩食饵鸟，喙尖呈凿形的鸟是刺蚌鸟，喙尖钝的鸟是锤蚌鸟。而喙尖呈凿形的鸟类的性别比例为50：50，尖喙尖的鸟类中超过70%是雌性，而钝喙尖的鸟类中近90%是雄性。两性之间在饮食和喂养方法上的差异在很大程度上可以通过整体喙测量的差异来解释;特别是喙深与喙长的比例。只有那些鸟有相对薄的法案是蠕虫饲料和只有那些鸟有相对厚的法案是贻贝hammerers。由于不同的饮食和饲养方法有不同的成本和收益，越冬存活的性别差异的可能性进行了讨论。
1. Previous papers have related individual differences in diet and feeding method in oystercatchers on the Exe estuary to age. In this paper they are also related to sex.2. Oystercatchers caught and ringed on the Exe estuary were sexed by discriminant analysis.3. Bill tip shape was measured and related to diet and feeding method. Birds with pointed bill tips were mudflat feeders, birds with chisel-shaped bill tips were mussel stabbers and birds with blunt bill tips were mussel hammerers.4. Whilst in birds with chisel-shaped bill tips the sex ratio was 50:50, over 70% of birds with pointed bill tips were females and nearly 90% of birds with blunt bill tips were males.5. Differences between the sexes in diet and feeding method can be explained to a large extent by differences in overall bill measurements; in particular, the ratio of bill depth to bill length. Only those birds that had relatively thin bills were worm feeders and only those birds with relatively thick bills were mussel hammerers.6. As different diets and feeding methods have different costs and benefits the possibility of sex differences in overwinter survival is discussed.